developmental

Community Partners Key to Success of Vaccine Clinic Focused on Neurodevelopmental Conditions

Community partnerships led to a specialized clinic delivering COVID and flu shots to individuals with neurodevelopmental conditions like autism at the MIND Institute.




developmental

Community Partners Key to Success of Vaccine Clinic Focused on Neurodevelopmental Conditions

Community partnerships led to a specialized clinic delivering COVID and flu shots to individuals with neurodevelopmental conditions like autism at the MIND Institute.




developmental

A Developmental Stage No One Talks About!

SUBSCRIBE There is a developmental stage that no one talks about. The transition from childhood to adulthood can be a challenge for even the most seasoned mamas. How do we successfully interact with our adult children? And what if our best attempt at parenting wasn't good enough?




developmental

A Smart Agricultural Knowledge Management Framework to Support Emergent Farmers in Developmental Settings

Aim/Purpose: This research aims to develop a smart agricultural knowledge management framework to empower emergent farmers and extension officers (advisors to farmers) in developing countries as part of a smart farming lab (SFL). The framework utilizes knowledge objects (KOs) to capture information and knowledge of different forms, including indigenous knowledge. It builds upon a foundation of established agricultural knowledge management (AKM) models and serves as the cornerstone for an envisioned SFL. This framework facilitates optimal decision support by fostering linkages between these KOs and relevant organizations, knowledge holders, and knowledge seekers within the SFL environment. Background: Emergent farmers and extension officers encounter numerous obstacles in their knowledge operations and decision-making. This includes limited access to agricultural information and difficulties in applying it effectively. Many lack reliable sources of support, and even when information is available, understanding and applying it to specific situations can be challenging. Additionally, extension offices struggle with operational decisions and knowledge management due to agricultural organizations operating isolated in silos, hindering their access to necessary knowledge. This research introduces an SFL with a proposed AKM process model aimed at transforming emergent farmers into smart, innovative entities by addressing these challenges. Methodology: This study is presented as a theory-concept paper and utilizes a literature review to evaluate and synthesize three distinct AKM models using several approaches. The results of the analysis are used to design a new AKM process model. Contribution: This research culminates in a new AKM process framework that incorporates the strengths of various existing AKM models and supports emergent farmers and extension officers to become smart, innovative entities. One main difference between the three models analyzed, and the one proposed in this research, is the deployment and use of knowledge assets in the form of KOs. The proposed framework also incorporates metadata and annotations to enhance knowledge discoverability and enable AI-powered applications to leverage captured knowledge effectively. In practical terms, it contributes by further motivating the use of KOs to enable the transfer and the capturing of organizational knowledge. Findings: A model for an SFL that incorporates the proposed agricultural knowledge management framework is presented. This model is part of a larger knowledge factory (KF). It includes feedback loops, KOs, and mechanisms to facilitate intelligent decision-making. The significance of fostering interconnected communities is emphasized through the creation of linkages. These communities consist of knowledge seekers and bearers, with information disseminated through social media and other communication integration platforms. Recommendations for Practitioners: Practitioners and other scholars should consider implementing the proposed AKM process model as part of a larger SFL to support emergent farmers and extension officers in making operational decisions and applying knowledge management strategies. Recommendation for Researchers: The AKM process model is only presented in conceptual form. Therefore, researchers can practically test and assess the new framework in an agricultural setting. They can also further explore the potential of social media integration platforms to connect knowledge seekers with knowledge holders. Impact on Society: The proposed AKM process model has the potential to support emergent farmers and extension officers in becoming smart, innovative entities, leading to improved agricultural practices and potentially contributing to food security. Future Research: This paper discusses the AKM process model in an agrarian setting, but it can also be applied in other domains, such as education and the healthcare sector. Future research can evaluate the model’s effectiveness and explore and further investigate the semantic web and social media integration.




developmental

School-Based Victimization Prevention Education Programs for Children and Youth With Intellectual and Developmental Disabilities: A Scoping Review

Child Maltreatment, Ahead of Print. Youth with intellectual and developmental disabilities (IDD) are at significantly higher risk of experiencing multiple types of interpersonal victimization across their lifespan compared to their peers without IDD. Despite the extensive literature on efficacy of prevention education programs for children without IDD, very little is known about comparable programs for […]

The post School-Based Victimization Prevention Education Programs for Children and Youth With Intellectual and Developmental Disabilities: A Scoping Review was curated by information for practice.



  • Meta-analyses - Systematic Reviews

developmental

Daniel Weinberger Receives National Academy of Medicines Sarnat Award for His Pioneering Research on Developmental Origins of Schizophrenia

The National Academy of Medicine today announced Daniel Weinberger is the recipient of the 2019 Rhoda and Bernard Sarnat International Prize in Mental Health, for his fundamental role in elucidating the biological origins and genetic expressions of schizophrenia, and for transforming how clinicians, researchers, and the public understand mental illness.




developmental

National Academies Completes Review of National Toxicology Program’s Draft Monograph on Fluoride and Neurodevelopmental and Cognitive Effects

Today the National Academies of Sciences, Engineering, and Medicine released its review of the National Toxicology Program’s (NTP) draft monograph Systematic Review of Fluoride Exposure and Neurodevelopmental and Cognitive Health Effects.




developmental

National Academies Complete Review of National Toxicology Program’s Second Draft Monograph on Fluoride Exposure and Neurodevelopmental and Cognitive Effects

The National Academies of Sciences, Engineering, and Medicine released today a review of the National Toxicology Program’s (NTP) second draft of the monograph Systematic Review of Fluoride Exposure and Neurodevelopmental and Cognitive Health Effects.




developmental

Marquis Who's Who Honors Joseph M. Lary for Expertise in Epidemiology, Developmental Biology and Consulting

Joseph M. Lary is lauded for his work at the Centers for Disease Control and Prevention and Hood and Associates




developmental

Sperm Heads the Agenda Among Top Developmental Biologists

Scientists gather to discuss breakthrough research and its applications for stem cell derivation.




developmental

University of Toronto physicists discover new laws governing the “developmental biology of materials”

Toronto, ON – When one atom first meets another, the precise nature of that interaction can determine much about what kinds of physical properties and behaviours will emerge. In a paper published today in Nature Physics, a team led by U of T physicist Joseph Thywissen reported their discovery of a new set of rules […]




developmental

LL10 - Developmental Internal Rotation - Femoral and Obturator Nerves

The tenth in our series on the lower limb is on Developmental Internal Rotation - Femoral and Obturator Nerves.
See our website for accompanying diagrams




developmental

Carnosine synthase deficiency is compatible with normal skeletal muscle and olfactory function but causes reduced olfactory sensitivity in aging mice [Developmental Biology]

Carnosine (β-alanyl-l-histidine) and anserine (β-alanyl-3-methyl-l-histidine) are abundant peptides in the nervous system and skeletal muscle of many vertebrates. Many in vitro and in vivo studies demonstrated that exogenously added carnosine can improve muscle contraction, has antioxidant activity, and can quench various reactive aldehydes. Some of these functions likely contribute to the proposed anti-aging activity of carnosine. However, the physiological role of carnosine and related histidine-containing dipeptides (HCDs) is not clear. In this study, we generated a mouse line deficient in carnosine synthase (Carns1). HCDs were undetectable in the primary olfactory system and skeletal muscle of Carns1-deficient mice. Skeletal muscle contraction in these mice, however, was unaltered, and there was no evidence for reduced pH-buffering capacity in the skeletal muscle. Olfactory tests did not reveal any deterioration in 8-month-old mice lacking carnosine. In contrast, aging (18–24-month-old) Carns1-deficient mice exhibited olfactory sensitivity impairments that correlated with an age-dependent reduction in the number of olfactory receptor neurons. Whereas we found no evidence for elevated levels of lipoxidation and glycation end products in the primary olfactory system, protein carbonylation was increased in the olfactory bulb of aged Carns1-deficient mice. Taken together, these results suggest that carnosine in the olfactory system is not essential for information processing in the olfactory signaling pathway but does have a role in the long-term protection of olfactory receptor neurons, possibly through its antioxidant activity.




developmental

ARID4B is critical for mouse embryonic stem cell differentiation towards mesoderm and endoderm, linking epigenetics to pluripotency exit [Developmental Biology]

Distinct cell types emerge from embryonic stem cells through a precise and coordinated execution of gene expression programs during lineage commitment. This is established by the action of lineage specific transcription factors along with chromatin complexes. Numerous studies have focused on epigenetic factors that affect embryonic stem cells (ESC) self-renewal and pluripotency. However, the contribution of chromatin to lineage decisions at the exit from pluripotency has not been as extensively studied. Using a pooled epigenetic shRNA screen strategy, we identified chromatin-related factors critical for differentiation toward mesodermal and endodermal lineages. Here we reveal a critical role for the chromatin protein, ARID4B. Arid4b-deficient mESCs are similar to WT mESCs in the expression of pluripotency factors and their self-renewal. However, ARID4B loss results in defects in up-regulation of the meso/endodermal gene expression program. It was previously shown that Arid4b resides in a complex with SIN3A and HDACS 1 and 2. We identified a physical and functional interaction of ARID4B with HDAC1 rather than HDAC2, suggesting functionally distinct Sin3a subcomplexes might regulate cell fate decisions Finally, we observed that ARID4B deficiency leads to increased H3K27me3 and a reduced H3K27Ac level in key developmental gene loci, whereas a subset of genomic regions gain H3K27Ac marks. Our results demonstrate that epigenetic control through ARID4B plays a key role in the execution of lineage-specific gene expression programs at pluripotency exit.




developmental

Transcription factor NF-{kappa}B promotes acute lung inȷury via microRNA-99b-mediated PRDM1 down-regulation [Developmental Biology]

Acute lung injury (ALI), is a rapidly progressing heterogenous pulmonary disorder that possesses a high risk of mortality. Accumulating evidence has implicated the activation of the p65 subunit of NF-κB [NF-κB(p65)] activation in the pathological process of ALI. microRNAs (miRNAs), a group of small RNA molecules, have emerged as major governors due to their post-transcriptional regulation of gene expression in a wide array of pathological processes, including ALI. The dysregulation of miRNAs and NF-κB activation has been implicated in human diseases. In the current study, we set out to decipher the convergence of miR-99b and p65 NF-κB activation in ALI pathology. We measured the release of pro-inflammatory cytokines (IL-1β, IL-6, and TNFα) in bronchoalveolar lavage fluid using ELISA. MH-S cells were cultured and their viability were detected with cell counting kit 8 (CCK8) assays. The results showed that miR-99b was up-regulated, while PRDM1 was down-regulated in a lipopolysaccharide (LPS)-induced murine model of ALI. Mechanistic investigations showed that NF-κB(p65) was enriched at the miR-99b promoter region, and further promoted its transcriptional activity. Furthermore, miR-99b targeted PRDM1 by binding to its 3'UTR, causing its down-regulation. This in-creased lung injury, as evidenced by increased wet/dry ratio of mouse lung, myeloperoxidase activity and pro-inflammatory cytokine secretion, and enhanced infiltration of inflammatory cells in lung tissues. Together, our findings indicate that NF-κB(p65) promotion of miR-99b can aggravate ALI in mice by down-regulating the expression of PRDM1.




developmental

The Path to Fluent Reading: A Developmental Timeline

Some of the most important pre-literacy skills begin in infancy. This timeline shows examples of the milestones children meet on their path to fluent reading.




developmental

New Director to Lead Division of Developmental Disabilities Services

NEW CASTLE (Jan. 31, 2018) – Department of Health and Social Services (DHSS) Secretary Dr. Kara Walker announced the appointment of Marie Nonnenmacher, a former deputy director of the Division of Developmental Disabilities Services (DDDS), to lead the division. She will begin her duties Feb. 5. “I am thrilled that Marie is rejoining our Department […]




developmental

Developmental Disabilities Services Announces Outreach to Service Recipients, Legal Guardians about Data Breach

DOVER (Oct. 21, 2022) – The Delaware Division of Developmental Disabilities Services is announcing today that it is mailing letters to service recipients and legal guardians who were impacted by a recent data breach incident and is providing information to the public regarding the incident. On August 23, 2022, staff within the Division of Developmental […]




developmental

De novo TRPM3 missense variant associated with neurodevelopmental delay and manifestations of cerebral palsy [RESEARCH ARTICLE]

We identified a de novo heterozygous transient receptor potential cation channel subfamily M (melastatin) member 3 (TRPM3) missense variant, p.(Asn1126Asp), in a patient with developmental delay and manifestations of cerebral palsy (CP) using phenotype-driven prioritization analysis of whole-genome sequencing data with Exomiser. The variant is localized in the functionally important ion transport domain of the TRPM3 protein and predicted to impact the protein structure. Our report adds TRPM3 to the list of Mendelian disease–associated genes that can be associated with CP and provides further evidence for the pathogenicity of the variant p.(Asn1126Asp).




developmental

[Developmental Biology] Glial Cell Development and Function in the Zebrafish Central Nervous System

Over the past decades the zebrafish has emerged as an excellent model organism with which to study the biology of all glial cell types in nervous system development, plasticity, and regeneration. In this review, which builds on the earlier work by Lyons and Talbot in 2015, we will summarize how the relative ease to manipulate the zebrafish genome and its suitability for intravital imaging have helped understand principles of glial cell biology with a focus on oligodendrocytes, microglia, and astrocytes. We will highlight recent findings on the diverse properties and functions of these glial cell types in the central nervous system and discuss open questions and future directions of the field.




developmental

[PERSPECTIVES] Developmental Dysregulation of Childhood Cancer

Most childhood cancers possess distinct clinicopathological profiles from those seen in adulthood, reflecting their divergent mechanisms of carcinogenesis. Rather than depending on the decades-long, stepwise accumulation of changes within a mature cell that defines adult carcinomas, many pediatric malignancies emerge rapidly as the consequence of random errors during development. These errors—whether they be genetic, epigenetic, or microenvironmental—characteristically block maturation, resulting in phenotypically primitive neoplasms. Only an event that falls within a narrow set of spatiotemporal parameters will forge a malignant clone; if it occurs too soon then the event might be lethal, or negatively selected against, while if it is too late or in an incorrectly primed precursor cell then the necessary intracellular conditions for transformation will not be met. The precise characterization of these changes, through the study of normal tissues and tumors from patients and model systems, will be essential if we are to develop new strategies to diagnose, treat, and perhaps even prevent childhood cancer.




developmental

Genes Shaping Human Brain Linked to Neurodevelopmental Disorders

The human brain's extended development is distinct among mammals and is believed to enhance our advanced learning capabilities. Disruptions in this process




developmental

FLVCR1 Mutation Linked to Developmental and Neurodegenerative Disorder

Thirty people whose disease went years without a diagnosis despite a great deal of clinical or genetic testing have received a genetic diagnosis from a global team of researchers.




developmental

Pediatricians Vs. ChatGPT: Assessing Developmental Delays

Cease seeking developmental assessments from medlinkChatGPT/medlink for your child. Recent research indicates that bmedlinkAI tools/medlink




developmental

Growing mathematical minds [electronic resource] : conversations between developmental psychologists and early childhood teachers / edited by Jennifer S. McCray, Jie-Qi Chen, and Janet Eisenband-Sorkin.

New York, NY : Routledge, 2019.




developmental

Developmental neurotoxicity: OECD/EFSA experts discuss non-animal test methods

Participants from 15 countries attended the Workshop on Developmental Neurotoxicity: The use of non-animal test methods for regulatory purposes” on 18 October 2016, in Belgium. The event, co-organised by the OECD and the European Food Safety Authority (EFSA), focused on opportunities and challenges related to alternative methods for testing and assessing the DNT potential of chemicals.




developmental

Obese marmosets are more developmentally advanced as infants, study shows

Marmosets on track for obesity appeared to be more efficient in their feeding behavior. “Although all animals consumed the same amount of liquid, the ones […]

The post Obese marmosets are more developmentally advanced as infants, study shows appeared first on Smithsonian Insider.




developmental

Daniel Weinberger Receives National Academy of Medicines Sarnat Award for His Pioneering Research on Developmental Origins of Schizophrenia

The National Academy of Medicine today announced Daniel Weinberger is the recipient of the 2019 Rhoda and Bernard Sarnat International Prize in Mental Health, for his fundamental role in elucidating the biological origins and genetic expressions of schizophrenia, and for transforming how clinicians, researchers, and the public understand mental illness.




developmental

National Academies Completes Review of National Toxicology Program’s Draft Monograph on Fluoride and Neurodevelopmental and Cognitive Effects

Today the National Academies of Sciences, Engineering, and Medicine released its review of the National Toxicology Program’s (NTP) draft monograph Systematic Review of Fluoride Exposure and Neurodevelopmental and Cognitive Health Effects.




developmental

New models to assess developmental toxicity for REACH

In line with EU legislative requirements, new research has developed models to assess the toxicity of chemicals in terms of their effects on human development. One of the models has been made freely accessible online, so that it is easy to use for industry and regulators.




developmental

The Warren Center Therapists' Guide to Great Toys for Developmental Stages

Check off your holiday shopping list with gifts that will help children meet their developmental milestones




developmental

Developmental activity gym for babies

A developmental toy for infants including an infant support surface having an open and a folded operative orientation, a first pair of circumferential elements associated therewith and having an open and a folded operative orientation and a second pair of elements, generally similar in configuration to the first pair of circumferential elements, arranged to support toy objects above the infant support surface and having an open and a folded operative orientation and a locking assembly for selectably locking the first and second pairs of circumferential elements in their respective open operative orientations, the open operative orientation of the infant support surface being an angular separation of 180 degrees, the open operative orientation of the first pair of circumferential elements being an angular separation of 180 degrees and the open operative orientation of the first pair of circumferential elements being an angular separation of substantially less than 180 degrees.




developmental

Geneticists pump the brakes on DNA, revealing key developmental process

Researchers at Princeton have revealed the inner workings of a gene repression mechanism in fruit fly embryos, adding insight to the study of human diseases.




developmental

Lab-grown mini-brains highlight developmental differences between humans and great apes

In a new study, brain-like organoids made from human cells were slower to mature than their chimpanzee and macaque counterparts.




developmental

Developmental peace in east Asia and its implications for the Indo-Pacific

8 January 2020 , Volume 96, Number 1

Ling Wei

This article adopts a constructive approach to examining the problem of the Indo-Pacific construct. Through reflection on the east Asian experience, it proposes an analytical framework of developmental peace as a constellation of international practices, which means that the more economic development is prioritized by states in regional processes, the more likely it is that a sustainable peace will be achieved. States participating in regional integration comprise a community of practice. On the basis of a shared understanding that development is of overriding importance and underpins security and state legitimacy, the community takes economic development as the anchoring practice; this practice embodies and enacts constitutive rules and fundamental norms for a broader set of practices in regional processes, such as peaceful coexistence and non-interference. The more economic development is prioritized on domestic and regional agendas, the more likely it is that conflicts in the security realm will be relaxed or even resolved to protect security interests. The author draws some useful implications from the developmental peace in east Asia for the Indo-Pacific construct, among which the most important include building shared understandings on the prioritization of economic development, taking advantage of the Regional Comprehensive Economic Partnership (RCEP), Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) and the Asian Infrastructure Investment Bank, and using the code of conduct process as a vehicle and best practice to facilitate rule-making for the maritime order. Finally, the author briefly discusses the contributions of the study and limitations of the model.




developmental

Developmental peace in east Asia and its implications for the Indo-Pacific

8 January 2020 , Volume 96, Number 1

Ling Wei

This article adopts a constructive approach to examining the problem of the Indo-Pacific construct. Through reflection on the east Asian experience, it proposes an analytical framework of developmental peace as a constellation of international practices, which means that the more economic development is prioritized by states in regional processes, the more likely it is that a sustainable peace will be achieved. States participating in regional integration comprise a community of practice. On the basis of a shared understanding that development is of overriding importance and underpins security and state legitimacy, the community takes economic development as the anchoring practice; this practice embodies and enacts constitutive rules and fundamental norms for a broader set of practices in regional processes, such as peaceful coexistence and non-interference. The more economic development is prioritized on domestic and regional agendas, the more likely it is that conflicts in the security realm will be relaxed or even resolved to protect security interests. The author draws some useful implications from the developmental peace in east Asia for the Indo-Pacific construct, among which the most important include building shared understandings on the prioritization of economic development, taking advantage of the Regional Comprehensive Economic Partnership (RCEP), Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) and the Asian Infrastructure Investment Bank, and using the code of conduct process as a vehicle and best practice to facilitate rule-making for the maritime order. Finally, the author briefly discusses the contributions of the study and limitations of the model.




developmental

Certain ortho-hydroxylated brominated ethers are promiscuous kinase inhibitors that impair neuronal signaling and neurodevelopmental processes [Cell Biology]

The developing nervous system is remarkably sensitive to environmental signals, including disruptive toxins, such as polybrominated diphenyl ethers (PBDEs). PBDEs are an environmentally pervasive class of brominated flame retardants whose neurodevelopmental toxicity mechanisms remain largely unclear. Using dissociated cortical neurons from embryonic Rattus norvegicus, we found here that chronic exposure to 6-OH–BDE-47, one of the most prevalent hydroxylated PBDE metabolites, suppresses both spontaneous and evoked neuronal electrical activity. On the basis of our previous work on mitogen-activated protein kinase (MAPK)/extracellular signal-related kinase (ERK) (MEK) biology and our observation that 6-OH–BDE-47 is structurally similar to kinase inhibitors, we hypothesized that certain hydroxylated PBDEs mediate neurotoxicity, at least in part, by impairing the MEK–ERK axis of MAPK signal transduction. We tested this hypothesis on three experimental platforms: 1) in silico, where modeling ligand–protein docking suggested that 6-OH–BDE-47 is a promiscuous ATP-competitive kinase inhibitor; 2) in vitro in dissociated neurons, where 6-OH–BDE-47 and another specific hydroxylated BDE metabolite similarly impaired phosphorylation of MEK/ERK1/2 and activity-induced transcription of a neuronal immediate early gene; and 3) in vivo in Drosophila melanogaster, where developmental exposures to 6-OH–BDE-47 and a MAPK inhibitor resulted in offspring displaying similarly increased frequency of mushroom-body β–lobe midline crossing, a metric of axonal guidance. Taken together, our results support that certain ortho-hydroxylated PBDE metabolites are promiscuous kinase inhibitors and can cause disruptions of critical neurodevelopmental processes, including neuronal electrical activity, pre-synaptic functions, MEK–ERK signaling, and axonal guidance.




developmental

Certain ortho-hydroxylated brominated ethers are promiscuous kinase inhibitors that impair neuronal signaling and neurodevelopmental processes [Cell Biology]

The developing nervous system is remarkably sensitive to environmental signals, including disruptive toxins, such as polybrominated diphenyl ethers (PBDEs). PBDEs are an environmentally pervasive class of brominated flame retardants whose neurodevelopmental toxicity mechanisms remain largely unclear. Using dissociated cortical neurons from embryonic Rattus norvegicus, we found here that chronic exposure to 6-OH–BDE-47, one of the most prevalent hydroxylated PBDE metabolites, suppresses both spontaneous and evoked neuronal electrical activity. On the basis of our previous work on mitogen-activated protein kinase (MAPK)/extracellular signal-related kinase (ERK) (MEK) biology and our observation that 6-OH–BDE-47 is structurally similar to kinase inhibitors, we hypothesized that certain hydroxylated PBDEs mediate neurotoxicity, at least in part, by impairing the MEK–ERK axis of MAPK signal transduction. We tested this hypothesis on three experimental platforms: 1) in silico, where modeling ligand–protein docking suggested that 6-OH–BDE-47 is a promiscuous ATP-competitive kinase inhibitor; 2) in vitro in dissociated neurons, where 6-OH–BDE-47 and another specific hydroxylated BDE metabolite similarly impaired phosphorylation of MEK/ERK1/2 and activity-induced transcription of a neuronal immediate early gene; and 3) in vivo in Drosophila melanogaster, where developmental exposures to 6-OH–BDE-47 and a MAPK inhibitor resulted in offspring displaying similarly increased frequency of mushroom-body β–lobe midline crossing, a metric of axonal guidance. Taken together, our results support that certain ortho-hydroxylated PBDE metabolites are promiscuous kinase inhibitors and can cause disruptions of critical neurodevelopmental processes, including neuronal electrical activity, pre-synaptic functions, MEK–ERK signaling, and axonal guidance.




developmental

Certain ortho-hydroxylated brominated ethers are promiscuous kinase inhibitors that impair neuronal signaling and neurodevelopmental processes [Cell Biology]

The developing nervous system is remarkably sensitive to environmental signals, including disruptive toxins, such as polybrominated diphenyl ethers (PBDEs). PBDEs are an environmentally pervasive class of brominated flame retardants whose neurodevelopmental toxicity mechanisms remain largely unclear. Using dissociated cortical neurons from embryonic Rattus norvegicus, we found here that chronic exposure to 6-OH–BDE-47, one of the most prevalent hydroxylated PBDE metabolites, suppresses both spontaneous and evoked neuronal electrical activity. On the basis of our previous work on mitogen-activated protein kinase (MAPK)/extracellular signal-related kinase (ERK) (MEK) biology and our observation that 6-OH–BDE-47 is structurally similar to kinase inhibitors, we hypothesized that certain hydroxylated PBDEs mediate neurotoxicity, at least in part, by impairing the MEK–ERK axis of MAPK signal transduction. We tested this hypothesis on three experimental platforms: 1) in silico, where modeling ligand–protein docking suggested that 6-OH–BDE-47 is a promiscuous ATP-competitive kinase inhibitor; 2) in vitro in dissociated neurons, where 6-OH–BDE-47 and another specific hydroxylated BDE metabolite similarly impaired phosphorylation of MEK/ERK1/2 and activity-induced transcription of a neuronal immediate early gene; and 3) in vivo in Drosophila melanogaster, where developmental exposures to 6-OH–BDE-47 and a MAPK inhibitor resulted in offspring displaying similarly increased frequency of mushroom-body β–lobe midline crossing, a metric of axonal guidance. Taken together, our results support that certain ortho-hydroxylated PBDE metabolites are promiscuous kinase inhibitors and can cause disruptions of critical neurodevelopmental processes, including neuronal electrical activity, pre-synaptic functions, MEK–ERK signaling, and axonal guidance.




developmental

Study: Evidence does not support classifying fluoride as cognitive neurodevelopmental hazard

The National Academies of Sciences, Engineering, and Medicine announced March 5 that it does not find that the National Toxicology Program adequately supported its conclusion that fluoride is “presumed” to be a cognitive neurodevelopmental hazard to humans.




developmental

Evolutionary developmental biology : a reference guide

9783319330389 (electronic bk.)




developmental

Understanding Gaps in Developmental Screening and Referral




developmental

Mental Health Difficulties in Children With Developmental Coordination Disorder

Cross-sectional studies have shown an increased risk of mental health difficulties in children with developmental coordination disorder. However, there has been limited longitudinal research in this area controlling for confounding factors and assessing the role of potential mediators.

Children with "probable" developmental coordination disorder at 7 years had a significantly increased risk mental health difficulties at 10 years. Protective factors for self-reported depression included high IQ, high self-esteem, good social communication skills, and the absence of bullying. (Read the full article)




developmental

Six Developmental Trajectories Characterize Children With Autism

Autism is widely considered a heterogeneous disorder in terms of etiology and phenotype. Although autism is usually a lifelong disorder, little is known about the rate or timing of how children develop regarding their communication and social functioning.

Utilizing annual evaluations for a large population of children with autism, we describe the 6 most common trajectories from diagnosis through age 14 years. Trajectories revealed considerable variation, and high socioeconomic status children were more likely to experience rapid improvement. (Read the full article)




developmental

Level of NICU Quality of Developmental Care and Neurobehavioral Performance in Very Preterm Infants

Although developmental care in NICUs reduces the stress experienced by preterm infants, the actual level of developmental care may vary and little is known about how the level of developmental care relates to preterm infants’ neurobehavioral performance.

The study demonstrates the relationship between variations in developmental care in NICUs and the neurobehavior of preterm infants. Infants from NICUs with high-quality developmental care compared with infants from units with low quality of care evidenced a better neurobehavioral profile. (Read the full article)




developmental

Maternal Metabolic Conditions and Risk for Autism and Other Neurodevelopmental Disorders

Diabetes during pregnancy has been associated with general development impairments in offspring; however, associations between autism and maternal diabetes have been inconsistent. Few studies have examined related conditions accompanied by underlying increased insulin resistance and their association with developmental outcomes.

This population-based study in young children provides evidence that maternal metabolic conditions are a risk factor for autism, developmental delay without autistic symptoms, and impairments in several domains of development, particularly expressive language, after adjusting for sociodemographic and other characteristics. (Read the full article)




developmental

Developmental Outcome at 6.5 Years After Acidosis in Term Newborns: A Population-Based Study

Conflicting results exist concerning long-term outcome in healthy infants with metabolic acidosis at birth.

Neonates who appear well after perinatal metabolic acidosis do not have an increased risk of neurologic or behavioral problems in need of referral actions or pedagogic arrangements at the age of 6.5 years. (Read the full article)




developmental

Developmental Status of 1-Year-Old Infants Fed Breast Milk, Cow's Milk Formula, or Soy Formula

Although soy protein–based infant formula is known to support physical growth equal to that of infants fed cow's milk–based formula, data are lacking on developmental status of infants fed soy formula compared with breast milk or milk formula.

Infants fed soy protein–based formula scored within normal limits on standardized developmental testing and did not differ from infants fed cow’s milk–based formula. Breastfed infants have a slight advantage on cognitive development compared with formula-fed infants. (Read the full article)




developmental

Neonatal Morbidities and Developmental Delay in Moderately Preterm-Born Children

Moderately preterm-born children (32–356/7 weeks’ gestation) are at risk for both neonatal morbidities after birth and developmental delays in early childhood. It is unknown whether neonatal morbidities contribute to the developmental delays of this particular group.

Of all neonatal morbidities commonly seen in moderately preterm-born children, only hypoglycemia increased the risk of developmental delay after moderately preterm birth. A concerted effort to prevent hypoglycemia after birth might enhance developmental outcome in this group. (Read the full article)




developmental

Persistent Snoring in Preschool Children: Predictors and Behavioral and Developmental Correlates

Loud snoring, which spikes at ~2 to 3 years of age, has been associated with behavior problems in school-aged children in cross-sectional studies, but no longitudinal studies have quantified predictors and the behavioral impact of persistent snoring in preschool-aged children.

Persistent loud snoring, which occurs in 9% of children 2 to 3 years of age, is linked with behavior problems. Higher socioeconomic status and a history of breastfeeding were associated with lower rates of transient and persistent snoring in young children. (Read the full article)